With the W10 Fall Creators Update, the GPU memory is lock at 1750 Mhz for dual monitor setup on display port connection. It will only clock down to 300Mhz with one display. Previous W10 Creator Update, GPU memory clocks from 300Mhz and scales to 1750 Mhz. GPU itself clocks from 300 to 1216Mhz on both W10 versions.

Already did a Restore Factory Defaults on AMD Radeon Settings and made sure Memory is set on Dynamic on Global WattMan.

I was running Speccy and noticed Display 1 was running 59Hz and Display 2 was at 60Hz, once set at both 60Hz GPU memory now clocks down to 300Hz. Before W10FCU I know both were at 60Hz. Solves this problem and hope it will help anyone with the same issue.

I was running Speccy and noticed Display 1 was running 59Hz and Display 2 was at 60Hz, once set at both 60Hz GPU memory now clocks down to 300Hz. Before W10FCU I know both were at 60Hz. Solves this problem and hope it will help anyone with the same issue.